MP2009-ULTRA LOW NOISE, LOW DROPOUT,120mA LINEAR REGULATOR

MP2009 Rev. 1.2

www.MonolithicPower.com

13

12/18/2013

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PCB LAYOUT GUIDE

PCB layout is very important to achieve good

regulation, ripple rejection, transient response

and

thermal

performance.

It

is

highly

recommended to duplicate EVB layout for

optimum performance.

If change is necessary, please follow these

guidelines and take figure 2 for reference.

1)

Input and output bypass ceramic capacitors

are suggested to be put close to the IN Pin

and OUT Pin respectively.

2) Ensure all feedback connections are short

and direct. Place the feedback resistors and

compensation components as close to the

chip as possible.

3) Connect IN, OUT and especially GND

respectively to a large copper area to cool

the chip to improve thermal performance and

long-term reliability.

MP2009

OUT

GND

VIN

EN

INPUT

2V to 6V

OUTPUT PRESET

1.5V to 4.5V

1uF

R1

100k

1uF

Figure 2 —MP2009 Typical Application Circuit

CIN

R1

1

2

34

5

VIN

EN

GND

NC

OUT

COUT

R1

VIN

VOUT

GND

Figure 3—MP2009 Top Layer